Truck dumping mechanism



Aug. 6, 1940. H. o DAY TRUCK DUMPING MECHANISM Original Filed Oct. 12, 1937 2 Sheets-Sheet l INVENTOR.

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ATTORNEY.

Aug. 6, 1940. H. 0. DAY

TRUCK DUMPING MECHANISM Original Filed Oct. 12, 1937 2 Sheets-Sheet 2 53 52 F|G.4. 42a.

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ATTORNEY Patented Aug. 6, 1940 Herbert 0. Day, Bowling Green, Ohio Application October 12, 1937, Serial No. 168,544 Renewed January 4, 1940 16 Claims.

This invention relates to improvements in the design of load dumping mechanism in vehicles, and more particularly to improvements in the construction of a body tilting or telescoping jack device in motor dump trucks.

That is to say, the body tilting mechanism covered by this invention may be considered as an assembly adaptable to a variety of standard types of motor vehicles, irrespective of certain structural differences and deviations in the arrangement of the machinery of various makes. More in particular, there is to be found a difference in the location of the power takeoff provided upon the engine for the operation of the pump that feeds the hydraulic cylinder of the jack device. Consequently, the mechanism or jack device assembly should be adaptable for instance to a power takeofl' which may be located either at the right or at the left of the engine housing.

One object is to produce a body tilting device having features of adaptability with respect to various makes and types of motor trucks.

Another object is the construction of a jack device or mechanism which is self-adjustable and stress relieving with respect to and in compensation of potential elastic deformations or so-called twisting of the vehicle body or chassis.

Other objects are the design of lateral bracing and more specifically of a pivotally mounted bracing construction or frame in conjunction with the base cylinder of the telescoping jack device, and which frame construction is relatively light, strong efiicient and free from excessive stress reactions.

These objects are attained by way of a resiliently mounted frame of particular structural design, surrounding the length of the jackcylinder.

Accordingly, some features relate to a peculiar mounting which permits rotative adjustment of the jack cylinder, together with its appurtenances, such as pump, etc., about the longitudinal cylinder axis, whereby to suit a variety of structural conditions; furthermore, to cushioning of the jack device or tilting mechanism relative to the vehicle frame, and more particularly to rubber cushioned journals or mountings for the trunnions of a tilting mechanism, for instance, one having ram action effect; and, furthermore, to special bracing construction or auxiliary framework for the jack cylinder, and more in particular to a frame to surround the jack cylinder and comprising converging main compression and main tension members.

Other features lie in the provision, and construction, and particular uses of a subframe in-' terposed between the journaled jack cylinder mounting and the chassis.

In one embodiment, the frame or mounting for the jack cylinder comprises a transverse member adapted to receive thereon the base portion of the jack cylinder, and also adapted to be journaled upon a subframe as by way of resilient bearing means provided thereon. Framework extending to and around the cylinder serves the dual purl0 pose of permitting rotative adjustment of the cylinder as well as of bracing the same as against the transverse member. Thus, the base of the cylinder is rotatably seated in a socket upon the transverse member, while a collar or clamp held 1 by brace connections surrounds the cylinder head. The brace connections comprise a pair of diagonal and presumably compression members extending from respective end-portions of the transverse member, and a pair of substantially parallel and presumably tension members'fianking the cylinder and extending frornan intermediate portion of the transverse member. The subframe is furthermore used in the pivotal mounting thereon of the tiltable vehicle body, for which reason it has a special reinforced rear beam which suitably is also used for towing, thus removing direct strain upon the chassis, simplifying assembly and construction.

Furthermore particularized, the base portion of the jack cylinder, being rotatably seated in the transverse member, has means for connection through which liquid is transferred from and to the respective sides of the hydraulic piston in the jack cylinder, the arrangement being such that ,35 the connection will not interfere with the frame structure surrounding the cylinder during a full turn rotative adjustment thereof.

The invention possesses other objects and features of advantage, some of which with the fore- 40 going will be set forth in the following description. In the following description and in the claims, parts will be identified by specific names for convenience, but they are intended to be as generic in their application to similar parts as 45 the art will permit. In the accompanying drawings there has been illustrated the best embodiment of the invention known to me, but such embodiment is to be regarded as typical only of many possible embodiments, and the invention is not to be limited thereto.

, The novel features considered characteristic of my invention are set forth with particularityin the appended claims. The invention itself, however, both as to its organization and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of a specific embodiment when read in connection with the accompanying drawings in which:

Fig. 1 is a plan view of the adjustable arrangement of the hydraulic jack cylinder and mountings therefor, including a subframe.

Fig. 2 is a longitudinal section of Fig. 1 along the line Fig. 3 is an enlarged rear end view of the jack device as journaled upon a subframe.

Fig. 4 is an enlarged longitudinal detail section of the rear, end portion of the jack cylinder and driving and operating appurtenances therefor.

Fig. 5 is the rear view of the cylinder base.

Fig. 6 is a longitudinal sectional view of Fig. 5.

Fig. 1 is the detail view of-a journal for the tiltable jack cylinder frame.

Figures 1 and 2 illustrate the general arrangeof a modified mounting .ment and mounting of the body tilting mechanisnr-relative to the chassis and to the body of the vehicle, and it also illustrates the features of rotative adjustability and improved mounting ofthe hydraulic jack cylinder.

A vehicle chassis is fractionally indicated as by beam portions i3, and it .carries'a subframe collectively indicated by the numeral The subframe comprises side beams |2 and I3, a front transverse beam I4, and a rear transverse beam l5 having certain reinforcement features. That is to say, the rear beam I5 is shown to constitute a box shape composed of angle irons l6 and" welded together at their lines of junction I3 and I3. This rear beam I5 is shown to serve for the pivotal mounting of the tiltable vehicle body 23 indicated by its bottom 2| and structural profiles 22. Therefore, the rear beam terminates in pivots 23 shown to extend from within the open end portions of the beam l5 and connected therewith in any suitable way, for instance, by way of welding.

Accordingly, the body is provided with a pair of brackets 24 for the pivots 23.

The rear beam |5 of the subframe is furthermore used to have anchored therein a tow eye 25 comprising a U-shaped bolt 26, a filler piece 21 and a pair of nuts 23 for the ends of U-shaped bolt.

The jack device proper to effect the tilting of the vehicle body, comprises a hydraulic jack cylinder 29 having a base or rear end portion 33 (see also Fig. 4) a head portion 3|, a piston 32, a piston rod or rain rod 33 having a ram head 34 having a universal joint connection with a pivot 35 seated in a bracket 36 fixed upon a beam incidentally composed of channel irons 31. The ram head is shown to have some lateral clearance 33 with respect to the sides of the bracket 36.

The base portion of the cylinder 33 of the jack cylinder has attached thereto a neck portion 39 having stiffener ribs 46, and it has a core 4| for the liquid that passes to and from the pressure side of the piston. The neck portion 39 also has incorporated in it a control valve 42 with control lever 420, which may be of any known construction used in connection with this class of apparatus. I

The neck portion further carries gear pump 43 having a driven, gear 44 and driving gear 45, surrounded by the pump housing 46 having a cover portion 41. A drive shaft 43 for the gear has a gland 49 in the pump cover 41,, a drive conneca,2io,142

\tion of the shaft 43 with the vehicle engine not being shown. The function of the pump is the usual one; that is to say, with .valve positioned to connect the pressure side of the jack cylinder with a channel 53 in the pump house 46 and neck portion 39 respectively. The pump when rotated in the proper direction forces pressure liquid such as oil past a spring pressed ball check valve 5| into the pressure section 52 of the jack cylinder. withdrawing such liquid from the opposite or liquid storage section 53 of the cylinder. The liquid thus feeding the pump is drawn from the storage section 53 by way of a by-pass connection 54 shown to consist of a pipe section 55 having a nipple connection 56 with jack cylinder and a nipple connection 51 with the base portion of the pump housing 46. From this by-pass connection liquid to feed the pump may pass through an inlet channel 53 in the pump housing and in the neck portion respectively.

The telescoping jack device and its appurtenances so far described are operativeiy supported ina composite pivotally mounted frame construction 59 herein shown to be journaled upon the subframe initially described. The jack cylinder is mounted in the frame 59 in amanner to permit rotative adjustment of the cylinder about its longitudinal axis. Therefore, and for certain reasons of bracing the cylinder, the supporting frame 59 includes component members described as follows: A transverse member 66 terminating in trunnions 6| and 62 has a central socket portion 63 for receiving the base portion or rear end of the jack cylinder 29. More specifically, the socket portion 63 has lateral lugs 64 and 65 over which fit tubular portions 66 and 61, the socket portion 63 and the tubular portions 66, 61 being rigidly connected for instance by welding as at 63 and 69 respectively.

Over the head portion 3| of the jack cylinder fits a collar 10 having laterally extending lugs, portions or bolts 1| and 12 with nuts 13 and 14. Between the transverse member 59 and the collar 10 extend bracing connections such as outer diagon'al members 15 and 16, and inner parallel mem-- the outer members are compression members shown to be structural profiles fastened to clip angle portions 19 and 30 rigidly extending from the transverse member 59 near the trunnions thereof and substantially symmetrically converging towards the cylinder head 3|, to be'fastened to the collar 13 as by way of the bolts and nuts 1|, 13, and 12, 14- respectively. Under the conditions assumed the members 11 and 13 are tension members and they are shown to be plain rods with an'eye portion 3| and 32 at one end held by the aforementioned bolts 1! and 12 respectively,'the other ends of the rods having threads and nuts 83 and 34 respectively to be anchored in the lateral lugs of the socket portion 63 (as shown in Fig. 1).

It will thus be noted that the parts 13, 15, 16 constitute a yoke-like frame portion extending from the end portions of the transverse member 59 substantially in a plane with a jack cylinder, and that members, for instance such as indicated at 11 and 13, serve to connect the intermediate portion of the transverse member 59 with the intermediate portion of the yoke-like frame portion. The intermediate connecting members 11 and 13 are adapted to be tensioned, and if tensioned, adapted to reduce the effective bending stress due to the cylinder force upon the transverse member 59, because then the tension is transmitt through the yoke-like frame portion substantiall to the end portions of the transverse member 59.

Accordingly, during operation of the jack device, under the conditions assumed, the reaction from the ramming pressure is met by the socket portion 63, tending to bend the transverse member 59, however such specific bending tendency is compensated for through the tension members 11 and 18 which transmit the stress back and by way of the collar 10 into the diagonal compression member 15 and 18 to a point near the trunnions GI and 62 respectively.

. In practical operation, that is, under load, the vehicle chassis as well as the body are subjected to elastic distortions or twisting. According to this invention, cushioned mountings are provided for the jack device relative to the chassis.

A simple journal bearing construction with inherent cushioning effect for the supporting frame 59 of the jack cylinder is shown in Figures I, 3 and 1 respectively. A U-shaped shell 85 is shown to be welded to each side member i2 and I: of the subframe ii. The shell holds a rubber filler or block 86 surrounding a metal sleeve or bushing 81 into which flt the trunnions oi' the swingable supporting frame 55. A simple angle clip 88 serves as a cover for the shell 85 when fastened to the subframe by means of bolts and nuts 89.

Figures 5 and 6 show a modification in the manner of mounting the jack cylinder in the swingable supporting frame. A supporting frame 90 is here shown to comprise a transverse member 9i having a central socket portion 92, diagonal braces between the transverse member and a jack cylinder 93 being indicated at 94. The jack cylinder is shown to have a base-or near end portion 95 from which extends a liquid by-pass connection 96 (for the purpose described) in such a manner that it does not obstruct or impair the free relative adjustabi ity of the jack cylinder with respect to the surrounding frame 90 in any rotative position whatsoever, and consequently so that it does not necessitate dismounting of the by-pass connection during any phase of rotative adjustment. At 91 is indicated suitable appurtenances such as a valve housing bolted to the cylinder base as at 98.

While the operation per se of apparatus of this type is clear and appears to be implied in the foregoing description, it should further be understood that the rotative ,adjustability of the Jack cylinder together with 'its appurtenances relative to its supporting frame 59 (see Fig. 1). permits this jack device assembly to be adapted to a variety of makes and types of vehicles and more particularly with respect to diverse locations of the power connection drive for the pump which mustreceive its impulse from a prime mover or engine of one type or another, or in a variety of cases where the pump is hemmed in and must be so placed as to clear adjoining portions of the machinery which are part of the motor vehicle per se. While in the embodiment of Figures 1 and 2 the range of rotative adJustment is somewhat confined due to potential interference of the by-pass connection 54 with portions of the swingable supporting frame 59, and a complete turn.

is only possible after dismounting 'that connec-- ous positions of rotative adjustment are indicated (in dot and dash) in Fig. 5.

Inasmuch as the jack device interconnects the chassis and the body both subject to twisting or deformations relative to each other, such potential deformations are allowed for by the cushioned mounting and the self-adjusting features of the jack device, and more particularly by inter- 4 posed cushioning means, for instance, the cushioned journals as described.

In view of the fact that the engine power take- 011 (not shown) in various instances may require a relative reversal of effective pump rotation, provision is made for mutually exchanging the position of the driving and of the driven gear respectively relative to the pump housing by way of merely reversing the position of the cover 4'! thereon.

I claim:

1. A body tilting mechanism for a load dumping vehicle having a chassis frame and a body pivotally mounted relative thereto, which mechanism comprises a telescoping jack device having a main jack cylinder and operating appurtenances therefor; means for operatively mounting the jack cylinder relative to the chassis frame in a manner to permit rotative adjustment of the cylinder about its longitudinal axis and with respect to the positioning of said appurtenances relative to parts of the vehicle mechanism, said mounting means adapted to take axial thrust of said cylinder and comprising a frame construction having a transverse portion adapted to receive the base of said cylinder and also adapted to have its end portion journaled relative to said chassis frame, said frame construction further having bracing portions for the cylinder extending from said transverse portions substantially in the direction of said cylinder.

2. A mechanism according to claim 1, in which said bracing portions of the frame construction comprise bracing members converging towards the cylinder head.

3. A mechanism according to claim 1, in which the bracing portions comprise diagonal members extending from the end portions of said transverse portion.

4. A mechanism according to claim 1, in which the bracing portions comprise a collar surrounding the free-end portion of the cylinder and bracing members connecting said transverse member with said collar.

5. A mechanism according to claim 1', in which the bracing portions comprise a system of substantially symmetrically arranged main tension and main compression members extending substantially in a plane with said cylinder and substantially symmetrically thereto.

6. A mechanism according to claim 1, in which the cylinder is seated upon said transverse member to transmit cylinder thrust thereto, and in which the bracing portions comprise a pair of symmetrically arranged diagonal members extending from the end portions of said transverse member, and a second pair of symmetrically arranged members extending from an intermediate portion of said transverse member.

7. A body tilting mechanism for a load dumping vehicle having a supporting frame and a body pivotally mounted relative thereto, which mechanism comprises a telescoping jack device having a main jack cylinder movable relative to the supporting frame and further comprises a frame construction having a transverse portion having associated therewith the base portion of said cylinder and also having its end portions mounted in journals in said supporting frame, said transverse frame portion adapted to be subject to a transverse bending force from said cylinder, a yoke-like portion extending from the end portions of the transverse member substantially in a plane with the cylinder toward the head portion thereof and adapted .to be swingable as a unit therewith, means for securing said yoke-like portion in said plane with said cylinder in a manner to permit of potential longitudinal play of the cylinder with respect to said yoke-like portion, said yoke-like frame portion consequently having end portions connected with the respectiveend portions of the transverse member, and having an intermediate portion associated with said cylinder; and a pair of members adjacent and substantially symmetrical to said cylinder and effective to connect the intermediate portion of said transverse frame portion with the intermediate portion of said yoke-like portion, said pair of members adapted to be tensioned, and if tensioned adapted to reduce the effective bending stress due to the cylinder force acting upon said transverse portion by transmitting the tension through said yoke-like frame portion substantially to the end portions of said transverse frame portion.

8. Mechanism according to claim '7, with the addition of means for adjustably tensioning said pair of members with respect to said transverse frame portion.

9. A mechanism according to claim 7, in which the journals comprise a resilient cushioning substance adapted to permit of bodily self-adjustment of said frame construction with respect to and in a manner to allow for elastic deformations of the associated parts of the vehicle such as the supporting frame and/or the body.

10. A mechanism according to claim 7, in which the journals comprise a bearing bushing, a'journal casing and a resilient cushioning substance surrounding said bushing and in turn surrounded by said journal casing.

11. A mechanism according to claim '7, in which the journals for the mounting means of the cylinder each comprise a laterally open U-shaped shell portion fixed to the supporting frame, which shell portions are adapted to receive said end portions of the mounting means and a resilient cushioning substance surrounding the same.

12. A mechanism according to claim 7, in which each journal for the cylinder mounting means comprises a laterally open U-sliaped shell portion fixed with respect to the supporting frame, a. bearing bushing and a resilient cushioning substance surrounding said bushing and'ln turn surrounded by said shell portion. V.

13. A body tilting mechanism for a load dumping vehicle having a chassis frame and a body pivotally mounted relative thereto, which mechanism comprises a telescoping jack device having a main jack cylinder and operating appurtenances therefor; means for swingably mounting the jack'cylinder relative to the chassis frame and in a manner to permit rotative adjustment of the cylinder about its longitudinal axis and with respect to the position of said appurtenances relative to parts of the vehicle mechanism, said mounting means adapted to take the axial thrust of said cylinder and comprising a frame construction substantially surrounding the length of the cylinder and adapted to receive the thrust therefrom, said frame construction having its portion adjacent to the base of the cylinder journaled relative to said chassis frame.

14. A body tilting mechanism for a load dumping vehicle having a chassis frame and a body pivotally mounted relatively thereto, which mechanism comprises a telescoping jack device having a main jack cylinder, means for swingably mounting the cylinder relative to the chassis frame and comprising a frame construction having a transverse portion having associated therewith the base portion of said cylinder and also having its end portions journaled relative to said chassis frame, and further comprising a reinforcing system of substantially symmetrically arranged main tension and main compression members, connected with said transverse memher to rotate therewith and extending substantially in a plane with said cylinder and symmetrically thereto, and effective to reinforce the transverse member with respect to load pressure from said jack cylinder.

15. A mechanism according to claim 14', in which said reinforcing system of members comprises a pair of symmetrically arranged diagonal members extending from the end portions of said transverse member, and a second pair of symmetrically arranged members extending from I an intermediate portion of said transverse member.

16. Mechanism according to claim 14, with the addition of means for tensioning the tension members with respect to the transverse members of said frame construction, to insure a desired transmission of thrust from the main jack cylinder by way of said transverse member to said tension members.

HERBERT 0. DAY. 

